Performance Check—2465B/2467B Service
e. Set the VOLTS/DIV to 0.5 V and repeat parts c
and d.
r. Move the signal to CH 4 and set the VERTICAL
MODE to display CH 4 only.
f. Set the VOLTS/DIV to 1 V and the generator output
level for a 4-division display at the reference frequency,
then change the generator frequency to 350 MHz.
g.
CHECK—Signal display amplitude is 2.82 divisions
or greater while sweeping the generator frequency from
350 MHz to 420 MHz.
s. CHECK—Repeat parts k through q for CH 4.
t. Disconnect the test setup.
7. Check Common Mode Rejection Ratio (CMRR).
a. Set:
h. Move the signal toCH 2 input connector and set the
VERTICAL MODE to disable CH 1 and display CH 2.
NOTE
Select channels to set VOLTS/DIV.
i. CHECK—Repeat parts c through g for CH 2.
Set the VERTICAL MODE to display CH 3 only.
k. Attach the standard-accessory 10X probe (supplied
with the instrument) to the CH 3 input connector and the
probe tip to the CALIBRATOR terminal.
Set the SEC/DIV (knob in) to 1 ms.
m. Adjust probe compensation for the best flat top on
the square-wave signal display.
n. Disconnect the probe tip from the CALIBRATOR ter-
minal.
Remove the grabber tip from the probe, unscrew
and remove the plastic barrel, and connect the probe to
the output of the Secondary Sine-Wave Generator (with
the leveling head) via a BNC-to-probe-tip adapter.
CH 1, CH 2 VOLTS/DIV
CH 1 and CH 2 VAR
CH 1, ADD, and INVERT
CH 2, CH 3, and CH 4
CH 1 and CH 2
Input Coupling
A SEC/DIV
TRIGGER MODE
TRIGGER SOURCE
10 mV
In detent
On
Off
50
Q
DC
50
MS
(knob in)
AUTO LVL
CH 1
b. Connect a reference frequency signal from the
Pri-
mary Leveled Sine-Wave Generator to the CH 1 OR X and
CH 2 input connectors via a 50
Q
BNC cable, a 5X
attenuator, and a Dual-Input Coupler.
c. Set the generator output level for an 8-division
display of the reference signal on CH 1.
d.
Adjust either the CH 1 VAR control or the CH 2 VAR
control for a minimum ADD display amplitude while leaving
the other control in the calibrated detent (whichever pro-
vides the best CMRR).
o. Set the SEC/DIV to 50 /us (knob in).
p. Set the generator output for a 4-division display at
the reference frequency, then change the generator
fre-
quency to 350 MHz.
q.
CHECK—Signal display amplitude is 2.82 divisions
or greater while sweeping the generator frequency from
350 MHz to 420 MHz.
e. Set the generator frequency to 50 MHz.
f. Set the A SEC/DIV to 20 ns.
g.
CHECK—ADD display amplitude is 0.4 division or
less (discount trace width).
h. Set ADD and INVERT Off and rotate the CH 1 and
CH 2 VAR controls CW to their calibrated detent positions.
4-12
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